sure...It's a major societal ill and a useless artifact that ruins lives. It's a conditioned visceral aversion to sex/gender related behavior that doesn't fit in with the cultural norm, and it's 100 percent unjustified.
When I was a kid and posted here more, I was generally okay with LGBTQ people but being a repressed trans girl who wanted to be one of the "cool kids" or more accurately "cool with the oppressors", I engaged in a lot of defensive othering and would frequently take jabs at the rest of the LGBTQ community to distance myself from the, because at the time I didn't see the value in being accepted as who i really was, and thought it would be better to construct a fake persona to try and fit in with some pretty shitty people because I was very immature and only cared about getting negative attention.
I'm just a person. I'm a trans girl, I'm on HRT, I dress feminine, use feminine pronouns and terms, despite the gender I was labeled as at birth, but it's not a big deal. Homophobes and transphobes make it a big deal for multiple stupid reasons, but just one that I figured would be very relevant to this thread is that, when I'm in public, homophobic straight men will see me and find me attractive at first, but then realized that I appear to be trans, and that makes them feel "violated" and "gay" because they're insecure and unwilling to admit that the things they find attractive are all just social constructs.
Transphobia is a separate issue, but a lot of it is rooted in homophobia too, because transphobic guys believe that acknowledging trans women as women, regardless of how feminine we present, makes them gay.
tl, dr, it's a ridiculous paranoia that makes people's lives way more difficult than we need to be and I think that anyone who explicitly supports bigotry of any kind is either stupid, brainwashed, outdated in mentality, or a straight up piece of shit, and I think the last one is really common, much more common than most people want to admit.